Throwing this out there as it's new to me, both the gun and the problem. It's a used DW RZ-10. Ed Brown branded 9 round mags. When I insert them the rim of the top round catches in the frame. I've never run into this before, though I've only owned one other 10mm. Wondering... is this a "common" problem? Is this a 10mm thing? A Dan Wesson thing? An Ed Brown thing? (or whomever really makes the mag) A 9 round mag thing? Just my frame? "An Ed Brown thing? " I'm starting to lean this way as I just realized the one magazine does it a good deal more than the other.